Trees; a handbook of forest-botany for the woodlands and the laboratory . Fig. 47. Norway Maple, Acer platanoides. Typical palmate vena-tion, a midrib, which comes off with the other, radiating, primariesb and d from a single point at the base; c tertiaries and terminalsforming network ; d basal primary ; e secondary ; / tertiary, p. 183 (Ett). (ii) Leaves small, usually not more than about6—8 cm. in diameter, but may reach 10 or12 cm.; pubescent below. Latex white. Acer campestre, L. Maple (Fig. 48). Small tree, oftenwith very corky twigs and branches. Leaves 3—7 x4—10cm., thin, not wrinkled
Trees; a handbook of forest-botany for the woodlands and the laboratory . Fig. 47. Norway Maple, Acer platanoides. Typical palmate vena-tion, a midrib, which comes off with the other, radiating, primariesb and d from a single point at the base; c tertiaries and terminalsforming network ; d basal primary ; e secondary ; / tertiary, p. 183 (Ett). (ii) Leaves small, usually not more than about6—8 cm. in diameter, but may reach 10 or12 cm.; pubescent below. Latex white. Acer campestre, L. Maple (Fig. 48). Small tree, oftenwith very corky twigs and branches. Leaves 3—7 x4—10cm., thin, not wrinkled and rather firm, more or less penta-gonal, cordate at the base; with 3—5 somewhat broadobtuse lobes, the lower much smaller, each slightly cut into MAPLE 185 further shallow rounded lobes or large teeth, or sinuate,and separated by deep angular sinuses, extending abouthalf-way in. Young leaves pubescent; the older glabrous,or pubescent beneath, especially on the venation, green and. Fig. 48. Maple, Acer campestre, p. 184 (D). somewhat shining above, paler beneath. Petioles oftenred, 3—4 (2—8) cm. long, slender, pubescent: latex three larger lobes entire towards their bases, but eachcut into about 3 lobules, and bluntly crenate or toothed 186 MAPLES: AUCUBA above. Leaves fine yellow in autumn, often disfigured byblack blotches due to the fungus Rhytisma. Venation palmate and like that of A. pseudoplatanus,but the secondaries on the midrib about \—\ the lengthof the latter apart. [Hartig pointed out that the leaves of A. pseudo-platanus and A. platanoides have a tuft of hairs at thejunction of the lamina and petiole ; and that A. campestreand A. pseudoplatanus bear small shortly-stalked capitateglands on the upper surface of the primary veins, whichcatch dust, pollen, &c. Acer pseudoplatanus is easily distinguished from by the blunter and more rounded lobes, thesinus deep and acute, and the want of milky juice ; fromA. campestre by
Size: 1316px × 1897px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidtreeshandboo, bookyear1904
